genetic engineering would not have been which of the following were not known

1.restriction endonunclease
2.RNA synthetase
3.DNA ligase
4.reverse transcriptase

Dear student.

The correct answer is restriction endonuclease.

Kindly refer the link below:

https://www.meritnation.com/ask-answer/question/what-are-molecular-scissors-explain-their-role-in-the-proce/biotechnology-principles-and-processes/6857369  

Regards.

 

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